com.funnelback.common.frontier.FIFOFrontier: This is a first-in first-out (FIFO) management scheme. Using this frontier allows the crawler to create multiple simultaneous connections to a target host. Note: This can generate heavy load on a target web server.

Default value

This specifies that a MultipleRequestsFrontier should be used, which in turn makes use of disk-based FIFOFrontiers of size 1000 each. Here size refers to the number of URLs per frontier i.e. in the example above each disk-based FIFOFrontier will store up to 1000 URLs each. When a frontier fills up a new one will be created so that all the URLs in the entire frontier are stored in a chain of backing frontiers.